{"title":"Optolong Chasing the Summer Milky Way Sale","description":"\u003ch2\u003eOptolong Chasing the Summer Milky Way Sales Event\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSave on select Optolong L-Series filters until July 20th.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSummer is Milky Way season, but the nights are short and clear skies are limited. Optolong L-Series filters help make every imaging session count by reducing light pollution, improving contrast, and bringing out more detail in your favourite summer targets.\u003c\/p\u003e\n\u003cp\u003eThis sale includes popular Optolong astronomy filters such as the L-Pro, L-eNhance, L-eXtreme, L-Ultimate, L-Quad Enhance, L-Synergy, L-Para, and more, with 1.25\", 2\", and camera clip-in options available.\u003c\/p\u003e\n\u003cp\u003eWhether you are imaging the Milky Way core, Lagoon Nebula, Trifid Nebula, North America Nebula, Veil Nebula, or the Cygnus region, Optolong helps you cut through the glow and capture more of the summer sky.\u003c\/p\u003e\n\u003ch3\u003eWhich Optolong filter should I choose?\u003c\/h3\u003e\n\u003cp\u003eChoose the L-Pro for broad light pollution reduction and natural colour balance. Choose L-eNhance, L-eXtreme, L-Synergy, L-Quad Enhance, or L-Ultimate when you want stronger nebula contrast and improved detail from emission targets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSale ends July 20th at Ontario Telescope and Accessories.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"l-enhance-1-25","title":"L-eNhance 1.25\"","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529727087,"sku":"L-E-1","price":233.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/opt-enhance-filter__87232.jpg?v=1766554962"},{"product_id":"l-enhance-2","title":"L-eNhance 2\"","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529759855,"sku":"L-E-2","price":296.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/opt-enhance-filter__45168.jpg?v=1766554967"},{"product_id":"l-pro-filter-1-25","title":"L-Pro Filter 1.25\"","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529792623,"sku":"L-Pro-1","price":179.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-125inch__76399.jpg?v=1766554973"},{"product_id":"l-pro-filter-2","title":"L-Pro Filter 2\"","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013529825391,"sku":"L-Pro-2","price":254.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-125inch__01695.jpg?v=1766554979"},{"product_id":"l-pro-filter-for-canon-aps-c-cameras","title":"L-Pro Filter for Canon APS-C cameras","description":"\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530251375,"sku":"L-Pro-EOS","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Canon_252520APS-c_252520Lpro__63720.1682640321.1280.1280.jpg?v=1766554985"},{"product_id":"l-pro-filter-for-canon-full-frame-cameras","title":"L-Pro Filter for Canon Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255); font-weight: bold;\"\u003eThis Canon full frame filter will fit the Canon 5D, 5D Mark II , 5D Mark III, and 6D only\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530284143,"sku":"L-Pro-EOS-FF","price":346.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-Clip-Filter-for-Canon-EOS-FF-L-Pro__32913.jpg?v=1766554991"},{"product_id":"l-pro-filter-for-nikon-full-frame-cameras","title":"L-Pro Filter for Nikon Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255); font-weight: bold;\"\u003eThis Nikon full frame filter will fit the Nikon D600, 610, 700, 750, 800, 800E, 810, 810A, DF\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eThe L-Pro (L-Professional) filter is \u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band.\u003c\/span\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm). It is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution. \u003c\/span\u003e \u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: rgb(255, 255, 255);\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" style=\"box-sizing: border-box; max-width: 100%;\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: rgb(61, 61, 61); font-family: Roboto; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530316911,"sku":"L-Pro-NIK-FF","price":349.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-filter-nikon-ff__45080.jpg?v=1766554998"},{"product_id":"l-pro-filter-for-sony-full-frame-cameras","title":"L-Pro Filter for Sony Full Frame cameras","description":"\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff; font-weight: bold;\"\u003eThis Sony full frame filter will fit the Sony A7M, A7M2, A7M3, A7R, A7R2, A7R3, A7S, A7S2, A9\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\u003eUnlike other light pollution filter UHC and CLS, L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMain Use and Performance\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for visual observation and astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNew Frame of Sony-FF Clip-in Filter Specifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eRaw material\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eoptical glass\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eThickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e300-750nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking depth\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003elight polluton line blocking\u0026gt;90%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSurface quality\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60\/40\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSurface shape\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eλ\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eParallelism\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30s\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. Spectrum for Reference\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7c815045ba97fb81bf0f0f6ebcf30612_1959f5b4-bf60-4fa2-8f00-311351a2f4f7.jpg?v=1766555005\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e4.  New Frame of Optolong Sony-FF Clip Filter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSony-FF specification\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eL-Pro\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplicable Camera\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eA7M\/ A7M2\/ A7M3、A7R\/ A7R2\/ A7R3、A7S\/ A7S2\/ A7S3、A9\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eApplicable Lenses\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eFull range of E-mount main and auxiliary lens \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e※  Due to limit lens resource, we only test the popular lens in market. If any available lens, feel free to contact Optolong customer service staff. We appreicate for your valuab testing information.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e5. How to install and remove?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/33c8423ec8ad9afe1da8288b5e3df5ce_2554ef03-c54d-490d-b0f3-ae439f4c1cf7.png?v=1766555007\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePut the camera body flat, the top of the filter \"OPTOLONG\" (the magnetic suction is on the back) into the body first (as shown in Figure 1), fixed by hand at the top, and then adjust the filter position, done for imaging (as shown in Figure 2).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eRemoving the Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/d704857628aa3195f91058ca6bd8e7d0_2208d125-9757-495a-aeb0-3d03db711ad9.png?v=1766555009\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter putting the camera body flat, use the triangle piece aid to tilt the filter gently (as shown in Figure 1), and remove the filter once it is loosened. Be sure to avoid scratch the lens and the camera!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e►\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVideo Direction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKindly click below image to review video about how to install and remove the filter at Optolong \u003cstrong\u003e\u003ca href=\"https:\/\/youtu.be\/PV1j3nZ69Kk\"\u003eYouTube channel\u003c\/a\u003e\u003c\/strong\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/youtu.be\/PV1j3nZ69Kk\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2bd2ac520fadc033eb4d913029b34817_88ea60b9-dfbe-4b74-a703-c70681fad3f3.png?v=1766555010\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e6. Packing: \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eShipment kit of new frame Sony-FF L-Pro clip: \u003cstrong\u003e\u003cu\u003eL-Pro filter, Trangle piece and installation instructions\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a1e0ef63a008e4635a9286ee44cd3f4f_7cd8a9cc-afee-43ad-a72a-5cb72c332a05.jpg?v=1766555012\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/901c018b5909bc701ba44a55541c5c5b_6e20d7b8-d155-43fd-a029-1a8f90a1c77b.jpg?v=1766555014\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e7. New Frame of Sony-FF Clip-in Filter L-Pro Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI  Milky Way by Vincent Cheng\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCamera : Sony A7s mod Lens : f2 @ Tokia FiRIN 20mm ISO 6400 exp time : 20s by Vincent Cheng\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/71def0e70d8987ca73c8ceb5cd3d899f_93568235-046c-4546-a8ee-917ab69e64d9.jpg?v=1766555015\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eII by Vincent Cheng\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCamera : Sony A7s mod Lens : f2 @ Tokia FiRIN 20mm ISO 3200 exp time : 20s by Vincent Cheng\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1c5af52c5e04a6e51a57d96ebfca7146_23f21928-e095-4019-a9e1-477e3b240df4.png?v=1766555017\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII Comparason image was shot by \u003cu\u003eArnaud Besancon\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures have been realised with 5D3 Astrodon modded and Samyang 24mm F1,4 at F2, 13s exp. time,3600 isos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures are raw,without post-process\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/64ea8f99ce850f20e6f2afd4a503d576_80d47a2f-3653-4085-8f7f-b63eefe09a54.jpg?v=1766555019\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIV M42 compare image by \u003cu\u003eLuca Fornaciari Astrophotography\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6a49a37b140c2be652e593edf2292836_018fe441-e983-4dd1-9444-e303153d48ae.jpg?v=1766555020\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eV The Horsehead Nebula©\u003cu\u003eLuca Fornaciari Astrophotography\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ba7b265d595e8ad401204a9f6eb9a813_cb9ae0a9-8ab6-4b16-b54d-6b2228342e42.jpg?v=1766555022\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVI M31 Andromeda by \u003cu\u003eGary J Palmer\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eImaged earlier in the week with a bright moon. 150 x 60 seconds processed in Pixinsight. SHARPSTAR 86mm Quad ZWO 094 PRO in ROI \u003cstrong\u003e\u003cu\u003eOptolong L-Pro\u003c\/u\u003e\u003c\/strong\u003e filter Sharpcap\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ee5023b46a4fad69a169ea0d8f0a446b_dde60652-fff5-4eb0-9bd5-d314ff8a3e03.jpg?v=1766555024\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVII Here the final Image of comet 46\/P Wirtanen and the Pleiades, shot by \u003cu\u003eBlake Estes\u003c\/u\u003e.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis imaging run ended up being a marathon that took about 22 hours of processing, using \u003cu\u003e\u003cstrong\u003eOptolong L-Pro\u003c\/strong\u003e\u003c\/u\u003e filter for imaging. Its absolutely perfect!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/cb49783642bed9a76a66acdee33dc5cc_b9480660-170e-40b9-9a13-a20198b15ea1.jpg?v=1766555025\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #ffffff;\"\u003eCheck out Trevor's review of the L-Pro from Optolong\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ccenter style=\"box-sizing: border-box; color: #3d3d3d; font-family: Roboto; font-size: 15px; background-color: #ffffff;\"\u003e\n\u003cbr style=\"box-sizing: border-box;\"\u003e\u003ciframe style=\"box-sizing: border-box; max-width: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/xSY3_fjaKIA\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\n\u003c\/center\u003e\n\u003cspan style=\"color: #3d3d3d; font-family: Roboto; font-size: 15px; background-color: #ffffff;\"\u003e \u003c\/span\u003e\n\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013530480751,"sku":"L-Pro-SONY-FF","price":346.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Optolong-L-Pro-Sony-FF-for-Astrophotography-wild-filed-Light-Pollution-Filters__01920.jpg?v=1766555028"},{"product_id":"l-extreme-2-dual-band-filter","title":"L-Extreme 2\" Dual Band Filter","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e1.  L-eXtreme Introduction\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eL-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be better choice for fast systems in competitive price. It isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who is living in very light polluted areas, or when the moon is out, the L-eXtreme will be a good filter.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eUnlike the Optolong L-eNhance filter which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual band that passes Ha and OIII emission lines. The advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines, as there is no nebula emission lines there. In this case, it isn't letting light pollution come through so that maximize nebulas signal and make the sky background darker while imaging. The L-eXtreme filter should better isolate the emission lines only and better protect from light pollution.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O is meaning for exploration of life.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTherefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e \u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e2.Spectrum and Characteristic\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSbustrate: B270\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eThickness: 1.85mm\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTpeak:  T\u0026gt;90%\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlocking range: 300-1000nm\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlcoking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eSurface quality: 60\/40\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003eTransmitted Wavefront RMS: ?\/4\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013587398767,"sku":"LXT-2","price":395.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OL-L-EXTREME_DSC_1817_300x300__09162.jpg?v=1766557075"},{"product_id":"l-extreme-1-25-dual-band-filter","title":"L-Extreme 1.25\" Dual Band Filter","description":"\u003cspan style=\"color: rgb(20, 23, 26); font-family: system-ui, -apple-system, BlinkMacSystemFont, \" segoe ui roboto ubuntu neue sans-serif pre-wrap rgb font-size:=\"\" white-space:=\"\" background-color:=\"\"\u003eL-eXtreme is a two 7nm bandpass filter which can be used with cameras, it is also more suited for fast systems.  Unlike the L-eNhance filter which is a tri-band (transmits Hb, Ha, and OIII), the L-eXtreme filter is dual band that passes Ha and OIII emission lines.\u003c\/span\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013587824751,"sku":"LXT-1","price":305.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OL-L-EXTREME_DSC_1817_300x300__34458.jpg?v=1766557081"},{"product_id":"l-enhance-for-canon-aps-c","title":"L-eNhance for Canon APS-C","description":"\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eAbout L-eNhance Filter\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255); text-align: justify;\"\u003e\u003cspan style=\"font-size: 10pt; font-family: arial, helvetica, sans-serif;\"\u003e\u003cspan style=\"color: rgb(25, 31, 37); white-space: pre-wrap;\"\u003eThe relentless spread of urbanization and its associated light pollution have become a growing problem for all amateurs and astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eL-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. \u003c\/span\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cbr style=\"color: rgb(25, 31, 37); font-family: \" microsoft yahei ui system-ui roboto sans neue sans-serif tahoma symbol font-size: white-space: pre-wrap background-color: rgb\u003e\u003cspan style=\"color: rgb(25, 31, 37); font-family: arial, helvetica, sans-serif; font-size: 10pt; white-space: pre-wrap;\"\u003eOptolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003cspan style=\"color: rgb(255, 0, 0); font-family: \" open sans sans-serif font-size:\u003eNotes: Compatible cameras of L-eNhance EOS-C Clip: 7D2\/82D\/800D\/77D\/70D\/760D\/750D\/700D\/650D\/600D\/60D\/60Da\/550D\/500D\/400D\/100D\/1100D\/1200D\/1300D; For Lens no limit EXCEPT for EF-S lens\u003c\/span\u003e\u003c\/p\u003e\u003ch4 style=\"margin: 10px 0px; font-family: Arial, sans-serif; line-height: 20px; color: rgb(48, 48, 48); text-rendering: optimizelegibility; font-size: 19.0667px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"color: rgb(153, 51, 0);\"\u003eL-eNhance Filter Spectrum Curve\u003c\/span\u003e\u003c\/h4\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003eAccording to the characteristics of celestial body emission lines and feature of light pollution span of spectrum, Optolong specially designed and optimized dual-band L-eNhance filter in order to retain the prominent color of nebula RGB while blocking out most of light pollution. Spectrum as shown below:\u003c\/p\u003e\u003ctable border=\"1\" style=\"max-width: 100%; background-color: rgb(255, 255, 255); border-collapse: collapse; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Arial, sans-serif; font-size: 14.6667px; width: 824px; height: 187px;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eSubstrate:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: justify;\"\u003eThickness:\u003c\/td\u003e\n\u003ctd style=\"text-align: justify;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTpeak:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003eT\u0026gt;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking range:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eBlocking depth:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003elight pollution  line blocking \u0026gt;99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eSurface quality:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd style=\"text-align: left;\"\u003eTransmitted Wavefront RMS:\u003c\/td\u003e\n\u003ctd style=\"text-align: left;\"\u003e\u003cspan style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt;\"\u003e?\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 10pt;\"\u003eParallelism (arcsec):\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp style=\"margin: 0px 0px 15px; font-family: Arial, sans-serif; font-size: 14.6667px; background-color: rgb(255, 255, 255);\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013595754607,"sku":"L-E-EOS-C","price":332.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/OPTOLONG-EOS-C-L-eNhance-Filter-Dual-band-Pass-Filter-Designed-for-DSLR-CCD-Control-from__05700.jpg?v=1766557332"},{"product_id":"optolong-l-ultimate-dual-3nm-filter","title":"Optolong L-Ultimate dual-3nm filter","description":"\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIt's a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Maximizes the transmission of the main emission lines of the nebula in OIII (496nm and 500nm) and H-alpha (656nm). Used with DSLR, color\/MONO CMOS and CCD, however, this filter is not suitable for fast ratio systems.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eThe advantage of L-Ultimate is that it only passes through the emission lines OIII(500.7nm) and Ha(656.3nm), in which case all other light pollution emission lines are eliminated so that only the emission and reflection signals of the nebula are captured during imaging. Therefore, the sky background of the image is darker, and the contrast between the nebulae and the signal-to-noise ratio are improved to the greatest extent. In heavy light pollution areas, the product can also selectively filter light pollution and clutter signals through the emission lines of nebulae, and finally avoid the impact of light pollution on astrophotography.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eIt is different from the series of dual-narrowband L-eNhance and L-eXtreme in that L-Ultimate is a dual-3nm bandwidth filter that only passes through Ha and OIII emission lines. You will get a darker sky background, more contrast of the image and the suppression on stars. L-Ultimate has also been optimized in terms of halo performance, so that there is no obvious halo when shooting on a bright star object.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-size: 16px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cstrong style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eMulti-layers anti-reflection coating\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eNon-cementing optical substrate coating\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e\u003cspan style=\"overflow-wrap: break-word; margin: 0px; padding: 0px; font-family: Arial, Helvetica, sans-serif;\"\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"overflow-wrap: break-word; margin: 0px; padding: 0px;\"\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44013781319791,"sku":"L-Ultimate","price":549.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-U1__11666.jpg?v=1766562590"},{"product_id":"optolong-l-extreme-f2-dual-band-filter-2","title":"Optolong L-Extreme F2 Dual-Band Filter 2\"","description":"\u003cp\u003e\u003cspan\u003eTake your Hyperstar, RASA, or Rokinon F2 DSLR lens to new heights.   Designed for Fast optics vetween F2-F3.5\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the requirements for transmission at continuously varying angles. Astronomically characterised spectral lines (OIII, Ha) as the main transmission wavelengths, the OIII and H-Alpha nebula emission lines pass accurately at f2 - f3.3 Focal Ratio.   It's a product that Optolong has developed specifically for fast optical systems, or fast focal ratio imaging systems. It has performed well on RASA, HyperStar and other fast ratio telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eKey Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTogether with one-shot colour astronomical cameras, monochrome astronomical cameras, and Digital SLR cameras, you can fast and quickly obtain clear and detailed images of the deep sky;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIdeal for fast optical system, like RASA, Hyperstar and other fast focal ratio telescope users;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecommended for using fast optical system with focal ratio from f2 to f3.3;\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAnti-light pollution、better contrast、more details of the celestial bodies:This filter cuts out background light and noise beyond the target celestial bodies to get better details and contrast of the images. L-eXtreme F2 can effectively block light pollution so that the images will not affected by unwanted lights, and sky light of the background. You can quickly get satisfactory pictures in fast optical systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSbustrate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eoptical glass\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eThickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.85mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eOIII 7nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHa 7nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e300-1000nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBlocking Depth\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u0026gt;OD4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSurface quality\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60\/40\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTransmitted Wavefront RMS\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eλ\/4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e Parallelism\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30s\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBased on the characteristics of celestial bodies’ emission lines and light pollution emission lines, the L-eXtreme F2 retains the prominent nebula OIII and Ha colours while blocking most of the light pollution. Specifically designed and optimally calculated for the characteristics of a fast optical system, the L-eXtreme F2 always keeps both OIII and Ha bands having high transmittance, which helps users to capture nebulae emission lines in these bands more accurately and quickly, and obtain better astrophotographic images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/30eaf24fdaf807b26d773ea5807517e4_8f724db7-9939-4c5b-aec7-774bfbcebc9b.jpg?v=1766568055\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_254844ff-2226-4755-b350-d88a6a3e7155.jpg?v=1766568057\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/22c5068a8f4783079f93c42761aa9238_dfbb67b1-248f-4a41-855e-89298cc7132d.png?v=1766568059\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a853b9fa6cd8dff29d844be5e277a9e7_b1912cb3-4313-4f75-8a5a-c3f6dceb7b0d.jpg?v=1766568060\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e6. L-eXtreme F2 Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eI. Test of the new Optolong Astronomy Filter L-Extreme F2 filter ©  Tommaso Massimo Stella     \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSadr and the Belly of the Cygnus.\u003cbr\u003eSadr is a yellow super giant star, 33,000 times more luminous than the Sun and 12 times more massive.\u003cbr\u003eIt is identified in the center of this wide-field image which portrays the center of the Northern cross (internal asterism in the constellation Cygnus). At bottom center and to the left, the Crescent nebula and the effects (cyan color, OIII) of the star Wolf-Rayet 134 can be seen.\u003cbr\u003eThe filter under test is designed to work with super fast optics centered on a focal ratio of 2. For the occasion, a full aperture Samyang 135mm f\/2 lens connected to the Omegon veTec571V4 camera was used.\u003cbr\u003eThe result is the stack of 11 exposures of 300 seconds and the processing was limited to the adjustment of the curves and a minimal stellar reduction without the use of AI tools.\u003cbr\u003eSky: SQM 19.95\u003cbr\u003eIn the first comment you can find insights into the test.\u003cbr\u003eSoon you will see published a more complete work on much weaker subjects.\u003cbr\u003eCredit: Tommaso Massimo Stella\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo?fbid=10225422708688182\u0026amp;set=a.1349013078910\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f21441527c08dc44ee513c1a500446de_9d30e9da-3647-4923-ba93-d59236d79160.jpg?v=1766568062\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eII. The Bubble Nebula ©Luke Newbould \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e52x2m exposures, RASA11, Player One Uranus-C Pro camera\u003cbr\u003eOptolong-L-Extreme f2 filter\u003cbr\u003eCaptured with NINA, \u003cbr\u003eStacked with AstroPixelProcessor, \u003cbr\u003eProcessed in PixInsight\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/21cee766946b225cc7089f5074877030_fad82a47-9b88-49ec-9c6a-eb275ca42f5d.jpg?v=1766568064\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eIII. NGC 6871, WR 134 \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e©João Berbereia\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTest with the new Filter Dual Narrowband L-eXtreme for F2 2\". The filter captures the light emitted by ionized hydrogen atoms (Hα 7nm) and doubly ionized oxygen ions (OIII 7nm) in the spectra of astronomical objects, such as nebulas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis image was capture for a duration of 30x300 seconds, totaling 2 hours and 50 minutes. It was taken from my backyard on August 14, 2023, on Terceira Island, Azores, Portugal.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGear Info:\u003cbr\u003eCelestron C8 HD + Hyperstar V4 （f1.9） 390mm\u003cbr\u003eIoptron CEM40EC\u003cbr\u003eASI071MC -10 100gain\u003cbr\u003eOptolong L-eXtreme F2 2\"\u003cbr\u003eEAF\u003cbr\u003eASI290MM\u003cbr\u003eSky-Watcher 50ED\u003cbr\u003eASIAIR\u003cbr\u003eBortle 4 - moon3% \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/9fb69e0a83b62c3a6b297b5dc30c3dbd_91772acf-eda3-45d1-83b7-e065e4dee392.jpg?v=1766568066\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003eIV.  Rosette Nebula © \u003ca href=\"https:\/\/www.facebook.com\/astronomono007\/posts\/pfbid0EjnNGx2fDHi8DYcAQhPyQ6P4RDysEF9Suc5tmAdFEae4Sd9jMrY7owZKKCFkg92sl\"\u003eAstrono Mono\u003c\/a\u003e \u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRosette Nebula, also known as Caldwell 49, is an H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, as the stars in the cluster formed from matter in the nebula.\u003cbr\u003eThe nebula has been observed to have a shape reminiscent of a human skull and is sometimes referred to as the \"Skull Nebula\". It should not be confused with NGC 246, which is also nicknamed the \"Skull Nebula\". \u003cbr\u003eTechnical data :\u003cbr\u003e45 x 300s L-eXtreme f\/2\u003cbr\u003eTakahashi Epsilon 180 ED (f2.8 focal ratio)\u003cbr\u003eZWO ASI2600MC-Pro Camera -10° ZWO ASI2600MC-Pro Camera -10° ZWO ASI2600MC-Pro Camera -10\u003cbr\u003eZWO EAF+ ZWO EFW + ZWO ASI AIR PRO\u003cbr\u003eZWO ASI 462 MC Guide Camera - Guidescope orion 80edcf\u003cbr\u003esqm 18.53 Cgem mount\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/astronomono007\/posts\/pfbid0EjnNGx2fDHi8DYcAQhPyQ6P4RDysEF9Suc5tmAdFEae4Sd9jMrY7owZKKCFkg92sl\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/8fff0674968eaf86bc57956e4d2abb66_0b7f7200-856f-416f-b05c-e61f69882bdb.jpg?v=1766568068\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cspan\u003e\u003cstrong\u003eV. The Cygnus Loop \u003c\/strong\u003e\u003c\/span\u003e\u003c\/u\u003e\u003cspan\u003e\u003cu\u003e\u003cstrong\u003e© Georg Nyman\u003c\/strong\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAstrophotographer Georg was taking images with RASA and the full frame QHY600C camera. \u003cbr\u003eThe Cygnus Loop – an object which is a very well known target of Ha and OIII. Indeed, Optolong L-eXtreme F2 performed very well and the separation of Ha and OIII is excellent – see attached result. \u003cbr\u003eThe image is a 2x1 mosaic\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Dr. Georg N. Nyman\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/32f461d9fec6c329d304c68e73346b82_874415bb-24e6-4fb7-a2af-b42ba7ee2a48.jpg?v=1766568070\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014031011951,"sku":"LXT-2-F2","price":404.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/LXT_F2__41051.jpg?v=1766568072"},{"product_id":"l-pro-filter-for-canon-eos-r","title":"L-Pro Filter for Canon EOS-R","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIntroduction\u003c\/strong\u003e\u003cbr\u003eIn suburban areas with weak light pollution, the color balance is good. The design of multi-band pass ensures excellent color restoration. L-Pro is a low color cast filter, which specially designed for starry sky photography. That is not possible with other light pollution filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\u003eUnlike other light pollution filter UHC and CLS, L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMain Use and Performance\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for visual observation and astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Pro EOS-R Compatible Cameras and Lens\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro EOS-R Compatible Cameras and Lens\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eApplicable camera body\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eEOS R\/Ra、EOS RP、EOS R5、EOS R6\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eApplicable Lenses\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eFull range of RF main and auxiliary lens\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFull range of EF main and auxiliary lens (adapter is required）\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003eTips:Due to limit lens resource, we only test the popular lens in market. If any available lens, feel free to contact Optolong customer service staff. We appreicate for your testing information.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1.3 Installation and Removing Instructions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/05d4e7c40914b3fee0917bfae39de551_a7728982-92a6-4c56-b39f-5905f423a0ca.png?v=1766568078\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eEOS-R L-Pro Clip More Explanation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDue to the particularity of Canon R series micro-single optical path, aperture design and light incident Angle, slight dark angle interference will occur when using interference filter for imaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere are two solutions to solve peripheral interference phenomenon：\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1\u0026gt;Cut out the interference areas of pictures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2\u0026gt;By post processing via RAW (attach video tutorials).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fb71928f6bfa47cd97bb18af518262a4_6d5e3201-6d23-48e6-a96b-ed7b370cc7a8.png?v=1766568079\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFinal version the Milkway by EOS R L-Pro.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCanon R+Canon RF15-35 f\/2.8+L-Pro clip Image came from domestic astrophotographer ©拂晓_718\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/01be58ed32f0d7d38f95787acc3e6ad3_02a3b108-048f-4c58-9b3f-41fed9dfa0e9.png?v=1766568081\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Pro Spectrum and Characteristic\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAccording to the relatively light pollution in suburbs, the image does not produce obvious color deviation phenomenon. The multi-band spectrum is specially designed and optimized as shown in the figure below.\u003cbr\u003ePeak transmittance:  T\u0026gt;90%\u003cbr\u003eBlocking range: 380nm-750nm\u003cbr\u003eBlcoking depth: light pollution  line blocking \u0026gt;90%\u003cbr\u003eSurface quality: 60\/40(Refer to MIL-O-13830)\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003e Parallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7c815045ba97fb81bf0f0f6ebcf30612_d9c3c9c4-576e-4a46-9069-ce997422eecd.jpg?v=1766568083\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The RED line shows the transmission line of L-Pro filter. The artifical emission lines are shown in ORANGE. And the emission lines from constellation are shown in GREEN.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_1a998e48-1507-47db-9346-75562f454fd6.jpg?v=1766568086\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/22c5068a8f4783079f93c42761aa9238_cde8eac0-5d4b-4980-938a-6330aeffeaaf.png?v=1766568089\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/a1e0ef63a008e4635a9286ee44cd3f4f_6175bb08-6023-4bbf-8983-d79955eb91d2.jpg?v=1766568092\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/901c018b5909bc701ba44a55541c5c5b_0de03426-90d2-4474-a2d2-f6b6852bc1c3.jpg?v=1766568095\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eL-Pro Imaging Target and Working Environment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImaging Target:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn light pollution environment, it suits for imaging the Milky Way at all seasons with wide Angle lens；\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn light pollution environment, it suits for imaging deep sky objects at all seasons;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for continuous spectrum of celestial objects, such as nebulae, galaxy, Milky Way, etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWorking Environment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Pro is suitable for level 3-7 according to the Botel dark space classification.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/17d50b8f6e8f12d7bb33d6ed590b7b40_a5c834bc-9511-4e93-b248-82fca8b79ef6.jpg?v=1766568097\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e7. L-Pro Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI Comparason image was shot by Arnaud Besancon\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures have been realised with 5D3 Astrodon modded and Samyang 24mm F1,4 at F2, 13s exp. time,3600 isos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll the pictures are raw,without post-process\u003cbr\u003e.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1f41cc683d82eb630d00c0a1b720cc7d_f961caf8-340e-4521-9c33-ff0c695e1a62.jpg?v=1766568099\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eII Antares Rho-Ophiuchi Complex, imaged by Mehmet Ergün\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eLa Palma.. It was gorgeous .. Both the island and the night sky. Mehmet brought a few gigabytes of data.\u003cbr\u003eObject: Antares Rho-Ophiuchi Complex\u003cbr\u003eEQUIPMENT\u003cbr\u003eASKAR ACL200 APO\u003cbr\u003eSharpstar Optics\u003cbr\u003eNikon Z6a CentralDS \u003cbr\u003eRST-135\u003cbr\u003eMGEN 3\u003cbr\u003eOptolong L-pro\u003cbr\u003eOptolong Astronomy Filter\u003cbr\u003eEXIF:\u003cbr\u003e50 x 240sec. \/ ISO1600 \/ 200mm \/ F4\u003cbr\u003e+ Flats\u003cbr\u003eFullframe, no crop    \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo\/?fbid=367951258011027\u0026amp;set=a.220016599471161\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/94747d73296d3a22f848c4b073c8a88e_2f6edec7-df45-4c14-b18c-d43ba6bb0ac4.jpg?v=1766568100\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIII Probably the most colorful and beautiful corner of our galaxy .., imaged by Mehmet Ergün\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eEQUIPMENT\u003cbr\u003eNikon Z6a CentralDS\u003cbr\u003eSamyang 50mm f1.4\u003cbr\u003eRainbow RST-135\u003cbr\u003eOptolong L-Pro\u003cbr\u003eLocation:\u003cbr\u003eATHOS Centro Astronómico La Palma\u003cbr\u003eLa Palma \/ 2021\u003cbr\u003eEXIF: \u003cbr\u003e90 x 240sec. \/ ISO1600 \/ F4 \/ 50mm   \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo\/?fbid=4293181824064956\u0026amp;set=gm.818913218993391\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6a1de42dc82aba5159c130971e4a501b_73ff89a4-b3bb-4ecc-90de-036e1dd4e58d.jpg?v=1766568102\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eⅣ The Andromeda Galaxy from Chuck’s Astrophotography\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Andromeda Galaxy is back in the night sky.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eby Optolong L-Pro filter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.facebook.com\/photo?fbid=228069719322609\u0026amp;set=a.124838279645754\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1bb81db9154f7e3d5170f89927e47d9b_fe8524c5-ad8c-42a2-a25e-1b99cb00b8f2.jpg?v=1766568103\" alt=\"\"\u003e\u003c\/a\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/8145909652ea8e4169fe0d9ecc56c0fd_f8868e54-7e3a-4aeb-8758-7090d2895ca4.png?v=1766568105\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e...\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●When using NK-FF \/EOS-FF clip-in filters, the lifting of the reflector will affect the optical viewfinder window (OVF), so you have to use Live View mode for shooting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Due to the different lens optical design of different manufacturers, part use of fisheye lens, ultra wide Angle lens and wide Angle lens may lead to image fuzzy at around. It is normal. Or you can choose L-Pro UT, the ultra-thin model to solve this problem.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Some entry-level models may fail to focus when using optical viewfinder (OVF) due to different focusing system designs. Using Live View(real-time display) mode for shooting will be recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●Pls DO NOT shoot directly at a strong light source, because that may produce secondary reflection and lead to the degradation of image quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e●When removing the clip-in filter, please place the camera flat and face up to avoid the filter touching the rear of the lens.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-About the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014031437935,"sku":"L-Pro-EOS-R","price":319.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Pro-R__71879.jpg?v=1766568107"},{"product_id":"optolong-l-quad-enhance-filter","title":"Optolong L-Quad Enhance Filter","description":"\u003cp\u003eL-Quad Enhance Filter (L-QEF) is a quad bandpass light pollution suppression filter for colour cameras. It effectively suppresses the transmission of light pollution wavelengths, especially light pollution generated by artificial lighting (including mercury and sodium lamps), as well as the effects of natural skylight-induced effects on the shot, thus effectively enhancing the contrast and details of the celestial bodies, and making the objects more distinct and stereoscopic. This filter provides better color balance while improving resistance of light pollution. L-QEF can be used for both wide field astrophotography, such as the Milky Way in Summer and Winter, and deep sky objects such as nebulae, galaxies, star clusters, and so forth; It allows you to save a lot of time during the shooting process and get better results at the same time. The design of quad bandpass maximises the colour balance of nebulae, galaxies and other broadband spectral targets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCuts out light pollution from mercury and sodium lamps and produces a nice broadband image with minimal colour cast;\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio (SNR);\u003c\/li\u003e\n\u003cli\u003eNear IR cut-off to 1000nm, reducing the effects of IR noise;\u003c\/li\u003e\n\u003cli\u003eL-QEF has more than 90% transmittance of the nebula emission lines at H-Beta\/OIII\/H-Alpha\/SII, with cut-off depth from OD2 to OD4, thus providing a significant increase in resistance to light pollution. L-QEF is good for night sky from Bortel 1 to Bortel 7 levels; (Bortel 8, Bortel 9 environments shall not be recommended, kindly chose Optolong other narrow-band filters, 3nm, 7nm type of filters are available.);\u003c\/li\u003e\n\u003cli\u003eSuitable for wide range of deep sky targets: it covers most nebulae, galaxies, star clusters, reflected and emitted line signals astronomical objects with higher contrast and rich details while maintaining excellent colour balance. L-QEF is superior to other filters of the same type.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"1\" cellpadding=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSbustrate\u003c\/td\u003e\n\u003ctd\u003eoptical glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eQuad bandpass filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking range\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eOD2-OD4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront RMS\u003c\/td\u003e\n\u003ctd\u003eλ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e Parallelism\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBased on the characteristics of celestial bodies’ emission lines and light pollution emission lines, L-Quad Enhance filter effectively reduces the impact of light pollution and suppresses the background light of astronomical objects, thus effectively enhancing the contrast and details of the celestial bodies. Using L-QEF filter can help you save a lot of time during the shooting process, yet obtaining incredible results.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_9b71fce5-43d1-415d-9743-156e271388b8.jpg?v=1766568128\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_25b08899-0043-4595-9a8f-2e31e029c55e.jpg?v=1766568130\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e·Multi-layers anti-reflection coating\u003c\/p\u003e\n\u003cp\u003e·Non-cementing optical substrate coating\u003c\/p\u003e\n\u003cp\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePacking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOuter Box: silve box\u003c\/p\u003e\n\u003cp\u003ePlastic Box: PP material\u003c\/p\u003e\n\u003cp\u003eLining: imported high pressure white EVA material\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/c656702f1ca52b7dc92d472bba4be081_419c1dc0-6c51-4b2b-a8c2-90f254c2b1b0.jpg?v=1766568131\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eL- Quad Enhance Filter (L-QEF) Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eI. The Seven Sisters meet the Comet ©  Vincent Cheng (China Hongkong)     \u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eThe seven sisters meet the Comet\u003cbr\u003eEquipment：\u003cbr\u003eDate \/Location :\u003cbr\u003e17-18, SEP, 2023\u003cbr\u003eDanXiaShan STARHOUSE, China（Bortle 4）\u003cbr\u003eCamea : ASI294MC Pro (cooled at 0C)\u003cbr\u003eGain : 120\u003cbr\u003eTelescope: William Optics RedCat 51 (250mm f4.9)\u003cbr\u003eFilter : Optolong L-QUAD ENHANCE 2-inch\u003cbr\u003eMount: iOptron SmartEQ PRO+\u003cbr\u003eGuide:  ASI120MM mini, ZWO OAG\u003cbr\u003econtrolled by ASIAIR plus\u003cbr\u003eExposure: 180s X 80frames\u003cbr\u003ew Dark Frames, Bias Frames, flat Frames\u003cbr\u003eprocess w PI,PS CC\u003cbr\u003eCredit: Vincent Cheng\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ab81cbde0345bb95f6e3c70c1211d265_e362d0cf-ebba-4ab6-84ee-c558219c25db.jpg?v=1766568133\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eII. Double Cluster  ©Astrodoc Ron Brecher（Canada） \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eThis image is a test of the new Optolong L-Quad Enhance Filter (LQEF), a light pollution filter for broadband photography. This test was conducted under a full Moon and moderate transparency – a tough test for any filter. For my first target I chose the Double Cluster to evaluate star colours and shapes. This filter performed well on these targets. I will test on a galaxy when the Moon is out of the sky.\u003c\/p\u003e\n\u003cp\u003eNGC 869 (right) and NGC 884 each contain hundreds of stars and are about 13 million years old (compared to 75-150 million years for the Pleiades). Lying about 7,500 light years away and a few hundred light years apart, they have a combined mass about 6,500 times our Sun’s. However, their combined halo is more than 20,000 solar masses. The clusters are moving towards us at a speed of about 40 km\/s.\u003c\/p\u003e\n\u003cp\u003eThese open clusters are bright enough that they were originally given star designations (h- and Chi Perseus). They are visible to the naked eye, appearing as an oval foggy patch in a dark sky. They look like sparkling white diamond dust in binoculars or a small telescope. \u003cbr\u003eTekkies:\u003cbr\u003eTakahashi FS-60CB scope with flattener at f\/6.2 and QHY367C Pro one-shot colour camera with Optolong L-Quad Enhance Filter.\u003c\/p\u003e\n\u003cp\u003eAcquisition and Paramount MX control with N.I.N.A.\u003c\/p\u003e\n\u003cp\u003eNo guiding All pre-processing and processing in PixInsight.\u003c\/p\u003e\n\u003cp\u003eAcquired from my SkyShed in Guelph on September 29, 2023. Average transparency and seeing, full Moon.\u003c\/p\u003e\n\u003cp\u003e42x5m chrominance = 3hr30m\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astrodoc.ca\/double-cluster-2023\/?fbclid=IwAR2n2qjMdmpycL8QjXDuig1IPnlKXcLZ5_sv4S0YFSkFczYpk5S47q7lTtE\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/683bb9bcfc4b10f1a169f16366e7a885_55bc9db9-13be-41de-8031-0932c99bcaba.jpg?v=1766568135\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIII. LDN 1235 Shark Nebula  ©Andrea Maggi (Italy) \u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eLDN 1235 Shark Nebula \u003cbr\u003eTesting the new Optolong filter for colour cameras\u003cbr\u003eSharpstar 76PH telescope \u003cbr\u003eCamera ZWO ASI 2600MC\u003cbr\u003eOptolong filter L-Quad Enhance Filter (L-QEF)\u003cbr\u003e11 hours of exposure\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/49deb2c530aa611105c6ecea0d48fd6c_364dbd36-e554-44fc-81ec-98bf8d0e0df0.jpg?v=1766568137\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIV.  The globular star cluster (M92) © Tommaso Massimo Stella (Italy) \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eThe globular star cluster (M92)\u003cbr\u003eThe performance of the filters is very good.\u003cbr\u003eDate: 2023-07-23\u003cbr\u003eLocation: Valle degli Ulivi (Taranto-Italy)\u003cbr\u003eSKY: SQM 19.85\u003cbr\u003eLights: 41x180s BIN2\u003cbr\u003eTelescope: Sky-Watcher 250\/1000 + GPU Coma Corrector\u003cbr\u003eCamera: Omegon veTEC 571C V4\u003cbr\u003eFilters: New Optolong Astronomy Filter broadband filter L-QEF\u003cbr\u003eMount: Skywatcher AZ-EQ6 GT\u003cbr\u003eProcessing: DeepSkyStacker, PixInsight, Photoshop CC\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fe6ac906ced83059b5b7679db589b355_a4135fce-f5be-47c6-ba53-d1f2150ff070.png?v=1766568138\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eV. The Sculptor Galaxy © First Person View Astro (Frank Arapovic)  \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eHere is my latest edit of NGC253 also goes by the name of The Sculptor Galaxy or by the name The Silver Dollar Galaxy. It is estimated to be about 45,000 light years across and 11.4 million light years away from Earth.\u003c\/p\u003e\n\u003cp\u003eThis image was taken with the new Optolong Filter User L-Quad Enhance Filter. This filter is excellent. The first thing you notice and really stands out after you open up the package is the build quality of the filter, it is second to none. You can see that the manufacturing and QC process has been to the highest standard.\u003c\/p\u003e\n\u003cp\u003eBut as you can see in the image it's the results that truly matters and I have found that this filter is capable of doing what it states, providing excellent image quality in light polluted areas.\u003c\/p\u003e\n\u003cp\u003eProcessing the image was easy too. There are no halos around bright stars thus far. I have imaged other targets but with only a limited amount of subs, such as M17 and NGC2070, however with the limited time I have had on those targets it's shown to be promising.\u003c\/p\u003e\n\u003cp\u003eI am yet to image some more difficult targets such as The Orion Nebula but I am keen to do so ASAP.\u003c\/p\u003e\n\u003cp\u003eThe image was taken in a bortle 5 location with the moon out over two nights of the 4th and 5th of October 2023\u003c\/p\u003e\n\u003cp\u003eCelestron EdgeHD8 at f7\u003cbr\u003eZWO ASI2600MC Pro, gain 101, -10c\u003cbr\u003e154 x 180sec subs, cropped\u003cbr\u003e30 x darks\u003cbr\u003e30 x flats\u003cbr\u003e30 x flat darks\u003cbr\u003eStacked and Processed with PixInsight\u003c\/p\u003e\n\u003cp\u003eBortle 5, backyard Auckland, New Zealand\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ace6fa6a8881a5d85e9f87e9db1d1c3b_b00f62d8-cb8b-4305-9d63-0cbb8d33f2ea.png?v=1766568140\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eVI. NGC7000 and the Pelican Nebula  © Shawn Nielsen (Canada)\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eNGC 7000 (left) and the Pelican Nebula (right) imaged with the new Optolong Quad enhance filter for OSC. \u003cbr\u003eAlso used, Starfield 60Q telescope, QHY268C camera and iOptron HEM15 strainwave mount. \u003cbr\u003e5hr 30min total. \u003cbr\u003eImaged under 80% Moon.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/836ffc71f86d80815dc32789f9f5844a_3b0ebed0-2abc-4fd8-a18c-2fafed3ce5d0.jpg?v=1766568142\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eVII. Shark nebula (LDN1235) © Matej Mihelčič （Slovenia） \u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eShark nebula (LDN1235)\u003cbr\u003eOmegon 108Q@600m \u003cbr\u003eASI094MC\u003cbr\u003eOptolong L-Quad Enhance Filter (L-QEF) \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/974bcc3bbe7d4033d39b8a142085e4ae_c3577fbf-e55d-4b6a-85b0-2697abfab55a.png?v=1766568144\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014033567855,"sku":"L-QEF","price":260.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Quad__13258.jpg?v=1766568146"},{"product_id":"lsynergy","title":"Optolong L-Synergy dual-narrow band filter FWHM7nm","description":"\u003cp\u003e\u003cspan\u003eOptolong L-Synergy‌ is a dual 7nm narrowband filter compatible with DSLR cameras, color CMOS sensors, and CCD cameras, supporting telescope systems with F-ratio of F3.3 or above (slower system）. Its key advantage lies in enabling astrophotography amateurs to capture exceptionally detailed emission nebulae even in light-polluted environments. it has been optimized to minimize bright star halos while isolating all emission lines except SII and OIII, achieving maximum effective transmission.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do we make a L-Synergy filter?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe core innovation of L-Synergy filters lies not in a single functional breakthrough, but rather in the precise combination of traditional dual-narrowband (Ha \u0026amp; OIII) technology—specifically tailored for color camera users. By adopting a dual-filter setup of ‌\"Ha \u0026amp; OIII + SII \u0026amp; OIII\"‌, it overcomes the inherent limitations of color cameras in narrowband astrophotography. With L-Synergy, users can achieve ‌Hubble Palette-style deep-sky images‌ comparable to those captured by monochrome SHO (SII\/Ha\/OIII) systems—‌without switching to a monochrome camera or purchasing additional SHO filters‌.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis solution delivers ‌high-quality results with minimal investment‌, making professional-level narrowband imaging accessible to all.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOptolong L-Synergy \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eO‌potlong L-Synergy‌ is a dual 7nm narrowband filter compatible with DSLR cameras, color CMOS sensors, and CCD cameras, supporting telescope systems with F-ratio of F3.3 or above (slower system）. Its key advantage lies in enabling astrophotography amateurs to capture exceptionally detailed emission nebulae even in light-polluted environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter years of technical refinement, it has been optimized to minimize bright star halos while isolating all emission lines except SII and OIII, achieving maximum effective transmission.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Synergy's advantage lies in its selective transmission of only the nebula emission lines OIII (500.7nm) and SII (672.4nm), while blocking all other light-polluting emission lines. This ensures that only the signals from oxygen and sulfur elements are captured during imaging, resulting in a darker sky background and significantly enhanced contrast and signal-to-noise ratio (SNR) between nebulae.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEven in heavily light-polluted areas, this filter selectively transmits nebula emission lines while filtering out light pollution, ultimately eliminating its impact on astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBy analyzing the spectral characteristics of both celestial emission lines and light pollution, L-Synergy selectively preserves the SII and OIII nebula colors while filtering out the majority of light pollution. Specifically designed and optically optimized, L-Synergy maintains consistently high transmission across both SII and OIII bands. This ensures users can precisely capture the target nebula emissions, delivering optimal astrophotography results.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2b383de22cb607feeca255a89118e02d_c59c14ec-2573-47b1-ad25-aff9ee7c5803.png?v=1766572845\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e*We will continue to optimize the product based on test results. This curve does not represent final product specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_d028d364-9008-450c-8d4c-49a24a348703.jpg?v=1766572846\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Synergy Filter Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eI. WR134 in the Cygnus constellation © Gianni Lacroce\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTest with the new Optolong L-sinergy filter, a 7nm S2 O3 dual-band filter, and \u003cu\u003eI have to say I really liked it.\u003c\/u\u003e\u003cbr\u003eI chose to photograph WR134 in the constellation Cygnus.\u003cbr\u003eHaving shot in monochrome, which usually results in a significant amount of signal with an H-alpha filter, the O3 is there, but sometimes I have to integrate a lot to bring it out; the S2 isn't there at all. So I thought, ‘There won't be all that much signal; to take a decent photo, I'll have to integrate a lot,’ and that's why I took 200 5-minute shots.\u003cbr\u003eOnce I'd processed the photo, I found it came out of the WBPP \u003cu\u003ewithout gradients or halos\u003c\/u\u003e, but above all, bicolour, meaning full of S2 and lots and lots of O3, and I find this wonderful. I didn't have to do anything else in processing except stretch the image, balance contrast, highlights, and tones to customise it a bit, but in the end, it was already like this in the raw file.\u003cbr\u003e\u003cu\u003eThis filter greatly simplifies post-production.\u003c\/u\u003e\u003cbr\u003eI'll also show you the Starless Nebula to help you understand the signal and the O3 it produces.\u003cbr\u003eMore shots of this new filter will follow soon.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eEQUIPMENT\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eImaging Telescope: Newton Tecnosky Carbon 200\u003cbr\u003eImaing CameraZwo Asi 2600 duo  \u003cbr\u003eMount: Zwo Am5\u003cbr\u003eOptolong \u003cu\u003e\u003cstrong\u003eL-Synergy\u003c\/strong\u003e\u003c\/u\u003e filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003ePHOTOS\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003etemp 0 with dark, flat and darkflat\u003cbr\u003e200 x 300s  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePROCESSING\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePixinsight\u003cbr\u003ePhotoshop\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3dc76bfb5842d4edd3a1bc3b42921500_6f36e30d-4f55-4c89-97c5-13015b330cb5.jpg?v=1766572848\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/e0ca57831dd087abad04f33706aad8e5_81e438a0-87a4-4e8c-82f2-315eedd0df6c.jpg?v=1766572850\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014143996015,"sku":"L-Synergy","price":389.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-Syn__10465.jpg?v=1766572852"},{"product_id":"optolong-l2-dual-combo-set-l-extreme-l-synergy","title":"Optolong L2 Dual-Combo Set (L-eXtreme\u0026L-Synergy)","description":"\u003cp\u003e\u003cspan\u003eL2 Dual-Combo Set includes two premium filters: one L-eXtreme and one L-Synergy.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-eXtreme:The L-eXtreme is a dual-narrowband filter (OIII-7nm \u0026amp; Ha-7nm) designed to exclusively transmit the key nebula emission lines of OIII (500.7nm) and Hα (656.3nm). By effectively blocking all other light pollution emission lines, it ensures that only the signals from OIII and Hα elements are captured during imaging, achieving maximum effective transmission. With years of technological refinement, it significantly optimizes the performance in suppressing bright star halos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eL-Synergy：The L-Synergy is a dual-narrowband filter (OIII-7nm \u0026amp; SII-7nm) that guarantees high transmission for both the SII (672.4nm) and OIII (500.7nm) spectral lines, while offering exceptional out-of-band rejection for all other wavelengths. By effectively blocking all other light pollution emission lines, it ensures that only the signals from OIII and SII elements are captured during imaging, achieving maximum effective transmission. With years of technological refinement, it significantly optimizes the performance in suppressing bright star halos.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy is L2 Dual-Combo Set?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe L2 Dual-Combo Set is engineered to unleash the power of Hubble Palette imaging for color camera users, supporting telescope systems as fast as F3.3, and above ( slower system).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTailored specifically for color camera astrophotographers, this set includes two premium filters: OIII \u0026amp; Hα (L-eXtreme),OIII \u0026amp; SII (L-Synergy).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis innovative combination breaks through the traditional limitations of narrowband imaging with color cameras. Without the need to switch to a monochrome camera or invest in an expensive SHO three-filter set, users can achieve stunning Hubble Palette images at a fraction of the cost and complexity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe core appeal of this combination design lies in lowering barriers and expanding possibilities for colour camera users: it preserves the equipment advantages of colour cameras while enabling users to unlock “Hubble-like” creative capabilities at minimal cost through minimalist filter combination. Simultaneously, it offers greater flexibility for astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhether capturing nebular detail or reproducing deep-sky colours, this combination enables richer creative expression, truly unlocking the full potential of colour cameras in deep-sky photography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBased on the characteristics of celestial emission lines and light pollution emission lines, the L2 Dual-Combo Set preserves the distinctive colours of nebulae in OIII, Hα, and SII while filtering out the vast majority of light pollution. Specifically designed and optically optimized, its transmission profile is as follows:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/19ce3d5664886f96373832d4be8e8830_0428b318-c584-448d-bc0e-6f4791225145.png?v=1766572864\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e*We will continue to optimize the product based on test results. This curve does not represent final product specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_845a4388-a28a-4d44-9b94-d842f2094bca.jpg?v=1766572865\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL2 Dual-Combo Set Packing Style\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: Gift set packing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure BLACK EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/b2fda500625ec7b632079fa3facd585b_ba756d4a-6de7-4d80-b96a-346a196e52c6.jpg?v=1766572867\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e6. L2 Dual-Combo Set Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eI. \u003c\/strong\u003e\u003cstrong\u003eNGC 7000 in SHO\u003c\/strong\u003e\u003cstrong\u003e©RONALD BRECHER\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNGC 7000 (also called the North America Nebula) dominates the left side of this image, and NGC 5070 (the Pelican Nebula) is to the right. These clouds of gas are part of a huge complex of emission nebulae lying about 1,600 light years away in northern Cygnus. With an apparent magnitude (brightness) of 4, in theory this object is visible to the naked eye, even though its light is very spread out. I have seen it with my naked eye and with low power binoculars in dark skies north of where I live. It looks like a faintly hazy, irregular patch of grey.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eI have previously imaged this region in a wide field and at higher resolution. For example, you can find images of the \u003ca href=\"https:\/\/astrodoc.ca\/southern-ngc7000-the-cygnus-wall\/\"\u003eCygnus Wall \u003c\/a\u003e(the “Central America” region) and \u003ca href=\"https:\/\/astrodoc.ca\/ic5070-and-ic5067-the-pelican-nebula\/\"\u003ethe Pelican\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll but one of my prior images has been in natural broadband colour, dominated by red emissions of hydrogen. For this image I used two Optolong dual-narrowband filters designed for colour cameras. The Optolong L-eXtreme passes hydrogen and oxygen emissions; the brand-new L-Synergy filter passes sulphur and oxygen emissions. I combined the data from the two filters assigning sulphur to red, hydrogen to green, and oxygen to blue, making the traditional Hubble Palette. As you can see from the image, the filters worked great. It will be available for purchase soon. This is the first narrowband image made with the 70mm f\/7 Sky-Watcher Esprit EDX refractor. Sky-Watcher hopes to have them available to buy by the end of 2025. Here is some preliminary information about the new Esprit EDX line.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/astrodoc.ca\/ngc-7000-sho\/\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/eb5a201a5a2700e7b4e509292cffabd9_e1f9820c-c155-4d9b-b939-8beca563c533.jpg?v=1766572869\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTekkies\u003c\/strong\u003e:\u003cbr\u003eAcquisition, focusing, and control of Paramount MX mount and other equipment with N.I.N.A. and TheSkyX. Unguided. Focus with Primalucelab Sesto Senso 2 on the Sky-Watcher stock focuser. Equipment control with Primalucelab Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from my SkyShed in Guelph. Acquired under average transparency and seeing and moderate to strong moonlight from August 31 – September 8, 2025.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSky-Watcher Esprit 70 EDX refractor, QHY367C Pro camera.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Synergy Filter: 147 x 5m = 11hr 50m\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eL-eXtreme Filter: 140 x 5m = 11hr 40m\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTotal: 23hr 30m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eData Reduction and Linear Processing\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePreprocessing: The WeightedBatchPreProcessing script was used to perform calibration, cosmetic correction, weighting, registration, local normalization, integration and Drizzle integration of all frames (Fast Drizzle, Scale=2x, Drop Shrink=0.9).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eGradient Removal: DynamicBackgroundExtraction was applied to the two masters (L-Synergy = SOO; L-eXtreme = HOO).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSHO Master Creation: PixelMath was used to create an SHO using the equations:\u003cbr\u003eR=SOO[0]\u003cbr\u003eG=HOO[0]\u003cbr\u003eB=0.25 x (SOO[1] + SOO[2]+HOO[1] + HOO[2]\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDeconvolution: BlurXterminator was applied to the SHO image using an automatic PSF, star sharpening set to 0.10, and “Correct First” selected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBy \u003ca title=\"Posts by Ron Brecher\" href=\"https:\/\/astrodoc.ca\/author\/astrodoc\/\"\u003eRon Brecher\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44014144389231,"sku":"O-L2-Dual Combo","price":719.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L2_combo__37454.jpg?v=1766572871"},{"product_id":"optolong-l-para","title":"Optolong L-Para","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do we make a L-Para filter with a dual band of 10nm?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn Chinese culture, the number ten symbolizes perfection in every way. An idiom in Chinese, 'shi quan shi mei' epitomizes reaching the best and most ideal state. \u003c\/span\u003e\u003cspan\u003eTherefore, \u003c\/span\u003e\u003cspan\u003ewe aspire for the L-Para filter to achieve this standard. Specifically, it operates in dual bands, each with a width of 10nm. The repetition of the number ten signifies double wishes for your photography experiences and clear skies always. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDuring the research phase, L-Para is dedicated to optimizing halo performance and effectively blocking out light pollution emissions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eImages captured by L-Para will exhibit a dark background and precise colors. Halos around bright stars are caused by a complex optical chain. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhile we can't say no halo, but we believe that L-Para offers a entirely new perspective. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdditionally, L-Para is compatible with both fast optics and normal optics, covering focal ratios from F2 and above. One filter is designed to work with all your telescopes. L-Para, bringing you greater efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOptolong L-Para(L-Parallels)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Para is a brand new dual narrowband 10nm light pollution filter. The FWHM of L-Para is 10nm for OIII (500.7nm) and H-Alpha (656.3nm) respectively. The transmittance of nebulae emission lines at are both greater than 85% in system with focal ratios of F2 and above. It effectively filters out mercury lamp, sodium lamp, and LED light pollution emission lines. At the same time, it has excellent contrast and anti-halo characteristics, allowing you to capture detailed and vivid nebula images. L-Para is suitable for both normal optical systems and fast optical systems, such as RASA and Hyperstar systems. Even when light is incident at an oblique angle, it can still maintain high transmission rates to provide you with a clear and precise shooting experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBroad Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA dual narrowband filter suitable for all telescope systems, adaptable to fast optics (focal ratios of F2, F2.8, F3.2, F4) as well as various standard\/normal focal ratio telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLight Pollution Resistance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEffectively cuts off emission lines from mercury lamps, sodium lamps, LEDs, and other light pollution sources, making it applicable to Bortle Scale1- 7 dark skies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHigh Transmission Rate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn systems with a focal ratio of F2 and above, the transmittance of nebula emission lines OIII and Ha exceed 85%, resulting in higher imaging efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eExcellent Contrast:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe high transmittance of nebula emission lines (OIII \u0026amp; Ha) combined with deep cut-off of light pollution bands significantly improves image contrast and detail richness.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAnti-Halo Characteristics:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe design has undergone several round of optimizations and many times of repeated testing ,resulting in a marked improvement in anti-halo performance, enhancing the capture of bright stars.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSpectrum\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAccording to the characteristics of the emission lines of celestial bodies and light pollution, as well as the characteristicas of the normal telescope and fast ratio imaging system, L-Para has been maintaining high transmittance at OIII and Ha while blocking light pollution emission lines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/9b96104f725faacefa9ded926bfab8da.png?v=1769584561\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2700143340459da0e3aa3e900c9c60f4.png?v=1769584562\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ec92b95b51a57afdfb563adfcf710c88.png?v=1769584564\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/0ff2d7f395c427aa390ff53daf333cec_df2ded20-3a4a-47c7-a6ff-7c451356df1d.jpg?v=1769584566\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOuter Box: silve box\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlastic Box: PP material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLining: imported high pressure white EVA material\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/e822f3dcce3aec3b4f0c2be188f05c41.png?v=1769584569\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eL-Para Filter Performance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHalo Testing\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNGC 7000\/Star level 1.24\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e68mm F3.9+ASI 6200MC、Single300s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6aa22d7117101f71c37596aff6970707.png?v=1769584571\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHalo Testing \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIC 434 The Horse Head Nebulae \/1.74 level\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e68mm F3.9+ASI 6200MC、Single 300s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/8323ef24348b4c584cb299bf620bda69.png?v=1769584572\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHeart Nebula\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSharpstar 76+2600MC + Optolong L-Para\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Andrea Maggi\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/7ef01e590ef6beb5819cf9b2b7734e59.png?v=1769584575\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eValle degli Ulivi \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLights: 38x600s Apo 102\/570mm + ASI 2600mc + AZEQ6 GT+ Optolong L-Para\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCredit: Tommaso Massimo Stella\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/100ffade46b9e69b02c908c22085a84e.png?v=1769584577\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":44119345496175,"sku":"L-Para","price":328.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/L-PAra1__89572.png?v=1769584579"},{"product_id":"optolong-l-pro-nikon-z-full-frame-clip-in-filter","title":"Optolong L-Pro Nikon Z Full Frame ILDC Clip-in Filter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Optolong L-Pro Nikon Z Full Frame ILDC Clip-in Filter is a broadband multi-bandpass light pollution filter from Optolong Optics that installs directly in the throat of full-frame Nikon Z-series mirrorless bodies. It suppresses the main artificial-light emission lines — mercury vapour and high\/low-pressure sodium street lighting — along with natural skyglow from neutral oxygen, while keeping the transmission windows over the key nebula lines open: OIII (496\/500nm), H-beta (486nm), H-alpha (656nm), NII (654\/658nm) and SII (672nm). Peak transmission is greater than 90% across a 380–750nm working range, with light-pollution line blocking above 90%. The design goal is low colour cast, so star colour and broadband target colour stay close to natural.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you shoot a full-frame Nikon Z camera from suburban or moderately light-polluted skies and want cleaner contrast without the heavy colour shift of older UHC\/CLS filters. It works whether you are capturing wide Milky Way scenes, broadband deep-sky targets such as galaxies and star clusters, or simply want a general-purpose light-pollution filter that still records natural colour. If your targets are emission nebulae under heavy light pollution, the narrowband L-eXtreme is the better tool.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-bandpass broadband design:\u003c\/strong\u003e keeps the OIII, H-beta, H-alpha, NII and SII windows open for natural star colour and low cast on galaxies and reflection nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-frame clip-in fit:\u003c\/strong\u003e seats in the Nikon Z throat ahead of the sensor, so it works behind any compatible lens with no filter threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad light-pollution suppression:\u003c\/strong\u003e attenuates mercury and sodium street-lighting lines and atmospheric skyglow, with line blocking greater than 90%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging-grade optical tolerances:\u003c\/strong\u003e λ\/4 transmitted wavefront, 60\/40 surface quality (MIL-O-13830) and 30-arcsec parallelism keep stars tight into the corners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable multi-layer coatings:\u003c\/strong\u003e ion-assisted deposition on a non-cementing substrate resists scratching and holds the central wavelength stable across temperature swings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOptical Design \u0026amp; Coatings\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe L-Pro is an interference filter: its passbands are formed by stacked thin-film dielectric layers rather than absorption glass, which is why coating quality and layer count drive its performance. Optolong applies these coatings by ion-assisted deposition on a non-cementing substrate, producing hard, stable layers whose transmission peaks do not drift significantly with temperature or age. Because transmission in any interference filter is angle-dependent, the filter is specified for use at roughly 50mm focal length and longer; below that, the steeper light cone from wide lenses can shift the passband at the frame edges and create an interference edge that is easily cropped. The transmission curve below plots the multi-band passband (red) against artificial pollution lines (orange) and natural constellation emission lines (green).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-pro-nikon-z-transmission-chart.jpg?v=1783183694\" alt=\"Optolong L-Pro Nikon Z clip-in filter transmission spectrum chart showing multi-bandpass light pollution suppression across 380 to 750nm\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWide-field Milky Way and nightscape imaging from suburban skies\u003c\/li\u003e\n\u003cli\u003eBroadband deep-sky imaging of galaxies, reflection nebulae and globular clusters\u003c\/li\u003e\n\u003cli\u003eGeneral light-pollution reduction for one-shot-colour astrophotography\u003c\/li\u003e\n\u003cli\u003eContrast enhancement where a broadband filter is preferred over narrowband\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera bodies:\u003c\/strong\u003e Nikon Z5, Z6, Z6II, Z7, Z7II, Z8, Z9 and ZF (full-frame Z mount).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLenses:\u003c\/strong\u003e all Z-series lenses; all F-series main and auxiliary lenses via the appropriate mount adapter\/connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal length:\u003c\/strong\u003e intended for use at 50mm and above; wider lenses may show an interference edge that can be cropped out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocus and compose:\u003c\/strong\u003e the clip sits in front of the sensor, so use Live View.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNot a solar filter — never use it to view or image the Sun.\u003c\/li\u003e\n\u003cli\u003eFull-frame Z mount only; not for APS-C\/DX or other mounts.\u003c\/li\u003e\n\u003cli\u003eA light-pollution filter raises contrast; it does not make the target brighter or remove light pollution entirely.\u003c\/li\u003e\n\u003cli\u003eBelow ~50mm the interference edge may need cropping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this good for beginners?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It installs without tools and works behind any compatible lens, so it is one of the simplest ways to lift contrast from a light-polluted backyard.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it for visual observing or astrophotography?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePrimarily astrophotography. As a broadband filter it also improves visual contrast, but its main role is imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich cameras does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFull-frame Nikon Z bodies: Z5, Z6, Z6II, Z7, Z7II, Z8, Z9 and ZF.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it cause a colour cast?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFar less than traditional UHC\/CLS filters; the multi-bandpass design is tuned for low cast and natural star colour.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it different from the L-eXtreme?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe L-Pro is broadband for general deep-sky, galaxies and Milky Way work with natural colour. The L-eXtreme is dual-narrowband (Ha\/OIII) for emission nebulae in heavy light pollution.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a low-colour-cast broadband clip-in filter for full-frame Nikon Z cameras that cuts sodium and mercury light pollution plus skyglow for Milky Way and broadband deep-sky imaging. Use it at 50mm and up, compose in Live View, and step up to the L-eXtreme when your targets are emission nebulae.\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":53546020143215,"sku":"OPT-LPRO-NKZ-FF","price":314.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3bc5b5663ee879da7a48733408704256.jpg?v=1783176103"},{"product_id":"optolong-l-extreme-nikon-z-full-frame-clip-in-filter","title":"Optolong L-eXtreme Nikon Z Full Frame ILDC Clip-in Filter","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Optolong L-eXtreme Nikon Z Full Frame ILDC Clip-in Filter is a dual-narrowband emission-line filter from Optolong Optics that installs directly in the throat of full-frame Nikon Z-series mirrorless bodies. It passes only two 7nm windows — centred on H-alpha (656nm) and OIII (496\/500nm) — and blocks the rest of the 300–1000nm range with light-pollution line blocking greater than 99%. Peak transmission is above 90%. Because there is no transmission between the H-beta and OIII lines, where nebulae do not emit, the sky background stays dark while emission-nebula signal stays strong, even under city skies or moonlight.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you image emission nebulae with a one-shot-colour full-frame Nikon Z camera from a light-polluted location, or want to keep imaging when the Moon is up. It suits fast lenses and telescopes and one-shot-colour deep-sky work on Ha\/OIII targets such as the Orion, Rosette, Heart and North America nebulae. It is an imaging filter, not a broadband or visual filter — for galaxies, clusters and reflection nebulae, use the L-Pro instead.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 7nm narrowband:\u003c\/strong\u003e isolates H-alpha and OIII to maximise nebula contrast and signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep out-of-band blocking:\u003c\/strong\u003e 300–1000nm rejection with line blocking greater than 99% keeps the background dark under heavy light pollution and moonlight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimised for fast optics:\u003c\/strong\u003e the passband is set to hold up with one-shot-colour cameras and fast focal ratios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-frame clip-in fit:\u003c\/strong\u003e seats in the Nikon Z throat ahead of the sensor and works behind any compatible lens with no threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging-grade optics:\u003c\/strong\u003e B270 substrate, 1.85mm thick, λ\/4 transmitted wavefront, 60\/40 surface quality and 30-arcsec parallelism for tight stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOptical Design \u0026amp; Coatings\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe L-eXtreme is a multi-layer interference filter built on a 1.85mm B270 substrate. Its two 7nm passbands are formed by stacked dielectric coatings applied with ion-assisted deposition, which is what allows such narrow bands to hold a stable central wavelength without drifting with temperature. The narrow bandwidth is deliberately matched to the H-alpha and OIII emission lines so that broadband light pollution — spread across the whole spectrum — is almost entirely rejected while the two nebula lines pass at high transmission. As with any interference filter, transmission is angle-dependent: performance is specified for roughly 50mm focal length and longer, and very fast cones or wide lenses can broaden and shift the effective band. The transmission curve below shows the two narrow passbands against the otherwise deep blocking.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/optolong-l-extreme-nikon-z-transmission-chart.png?v=1783183694\" alt=\"Optolong L-eXtreme Nikon Z clip-in filter transmission spectrum chart showing dual 7nm narrowband Ha and OIII passbands\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne-shot-colour imaging of emission nebulae (Ha\/OIII) from light-polluted skies\u003c\/li\u003e\n\u003cli\u003eDeep-sky imaging through bright-moon periods\u003c\/li\u003e\n\u003cli\u003eFast-system widefield and telescope astrophotography of HII regions\u003c\/li\u003e\n\u003cli\u003eBicolour \/ narrowband-style processing from a single OSC camera\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera bodies:\u003c\/strong\u003e Nikon Z5, Z6, Z6II, Z7, Z7II, Z8, Z9 and ZF (full-frame Z mount).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLenses:\u003c\/strong\u003e all Z-series lenses; all F-series main and auxiliary lenses via the appropriate mount adapter\/connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal length:\u003c\/strong\u003e intended for use at 50mm and above; wider lenses may show an interference edge that can be cropped out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocus and compose:\u003c\/strong\u003e the clip sits in front of the sensor, so use Live View.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNot a solar filter — never use it to view or image the Sun.\u003c\/li\u003e\n\u003cli\u003eNarrowband only — not for broadband targets; galaxies, clusters and reflection nebulae are better served by the L-Pro.\u003c\/li\u003e\n\u003cli\u003eDesigned for astrophotography rather than general visual observing.\u003c\/li\u003e\n\u003cli\u003eFull-frame Z mount only; not for APS-C\/DX or other mounts.\u003c\/li\u003e\n\u003cli\u003eBelow ~50mm the interference edge may need cropping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this good for beginners?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is best once you are comfortable with deep-sky capture and processing. If you are shooting broadband Milky Way scenes, the L-Pro is the easier starting point.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eImaging emission nebulae (H-alpha and OIII) from light-polluted skies or under moonlight with a one-shot-colour camera.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it for visual or astrophotography?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAstrophotography. The narrow dual-band design is optimised for imaging, not general visual use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich cameras does it fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFull-frame Nikon Z bodies: Z5, Z6, Z6II, Z7, Z7II, Z8, Z9 and ZF.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it different from the L-Pro?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe L-eXtreme is dual-narrowband (Ha\/OIII) for emission nebulae in heavy light pollution. The L-Pro is broadband for galaxies, clusters and Milky Way work with natural colour.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a dual-narrowband 7nm Ha\/OIII clip-in filter for full-frame Nikon Z cameras that pulls emission nebulae out of light-polluted or moonlit skies. Use it at 50mm and up with a one-shot-colour camera, and switch to the L-Pro for broadband targets.\u003c\/p\u003e","brand":"Optolong Filters","offers":[{"title":"Default Title","offer_id":53546071294063,"sku":"OPT-LEXT-NKZ-FF","price":327.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/3bc5b5663ee879da7a48733408704256_31333984-9c05-4b01-99cb-fa4a986b8be8.jpg?v=1783176173"}],"url":"https:\/\/ontariotelescope.com\/collections\/optolong-summer-milkyway-sale.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}